Paper perforator with automatic reinforcing device of the paper at the holes



J 14 1941 I. SKREBBA, GEB. STUHLINGER 2 22 372 PAPER PERFORATOR'WITHAUTOMATICREINFORCING DEVICE OF THE PAPER AT THE HOLES Filed May 20, 19362 SheetS -Sheet 1 n I v Q INVENTOR gzzu A Sham. BY (1. Nl uv ATTORNEY I.SKREBBA,- GEB. STQl- ILINGER 2 228,372

PAPER PERFORATOR WITH AUTOMATIC REINFORCING DEVICE OF THE PAPER ATTHE'HOLES I Filed May 20, 1936 2 Sheets-Sheet 2 Jan. 14, 1941.

INVENTOR BY 3m ATTO NEY also supported by walls Patented Jan. 14', 1941one srA'rss PAPER PERFORATOR WITH AUTOMATIC RE- INFORGING DEVICE OF THEPAPER AT THE HOLES Ida Skrebba, geb. Stiihlinger, Lahr in Baden, GermanyI 1 Application May 20, 1936, Serial No. 80,842 In Germany September 12,1935 12 Claims.

This invention relates to ofiice machines which serve to perforatesheets of paper, cards, copies and other paper documents to allow themto be threaded for instance, on the ispindles' of files, "and theinvention relates more particularly to the type of machine whichcomprises an automatic feeding and sticking device for cuttingreinforcing strips which are laid on the document, are stuck to it andwhich are perforated at the same time as the document to reinforce it atthe place where the holes are made. I

One of the objects of the invention is to realize a machine of this typein which the feeding mechanism for the reinforcing strips may be lockedat will, to effect perforations only when it is not desired to reinforcethe documents. Another object is'to combine the mechanism and itsactuating part in such a manner that when movement of the mechanism hasstarted, no other movement of the mechanism canbe started or eflectedbefore the completion of the started movement. v

Other important objects and advantages of the invention will appear inthe course of the following description of the appended drawings, inwhich a Fig. l is' a front view of the machine,

Fig. 2 is a top view,

Fig. 3 is an end view, I

Fig; 4 is a section along line IV-IV of Fig. 2.

Fig. 5 shows details of the feed-drums for the reinforcing strip,

Fig. 6 shows details of a knife.

The machine comprises a rigid underpart or support I for example videdwith vertical edges 2 which serve to support the various elementsmentioned hereafter. Those two vertical edges or walls extend alongabout the half of the length of the support I, the other part of saidsupport being covered by a table 4 for reception of the documents to beperforated. At its side adjacent to walls 2, the table 4 is providedwith stops such as 5 against which the documents. abut and the table 4is formed to provide holes 6 in which the perforating punches 'I' willenter during perforating operations.

These punches arecarried by a perforating top 8 extending transversallyto the table 4 and fixed to the top end of a lever 9 pivoting aroundshaft it supported by the walls 2. A spring ll tends-to push lever 9away from table 4. Around shaft l2, 2, ispivotably carried a lever i3provided with a handle I4; This lever l3 embraces the top of lever 9and, when pushed down, it is applied on to a. rotatable roller l5 I6,passesthrough a made of sheet-iron, pro- I carried by top 8. When top 8is pushed down, the punches 1 are actuated to perforate the documentsnot by a direct action on lever 9, butover. lever l3 and roller l5. Onaccount of the proximity of pivot 52 and top 8, this arrangement 5considerably lowers the effort necessary to perforate a certain numberof documents at the same time. As shown by the drawings, when theperforating punches penetrate in the documents, the direction of theeffort on roller I5 is exactly par- 10 allel to the downward movementofthose punches. This permits all of the force to be applied to theperforating action and makes the device operate with a minimum ofeffort.

Each vertical wall 2 supports on the outside a 15 drum or bobbin l6carrying a reinforcing strip of paper l'l. This paper strip unrolledfrom bobbin feeding device which will be described hereafter and is thenlead by the downward movement of lever 9 above the-docu- 2o mentssupported by table 4 exactly over the holes 6. Each of the punches Icarries an elastic pressure pad l8 which when perforation is effected,presses strongly on strip I! brought above the document to maintain saidstrip over the 25 holes 6 during perfor ion and cutting operation and tostick it on the document.

Progress of strips IT is realized between two drums 'or bobbins l9 and20, for each strip; the two bobbins is are locked on the same shaft 2|carried by walls 2 and which carries a metallic "disc 22, provided withteeth 23 protruding from the plane of the disc. Preferably, those teethare obtained by cutting out the edges of the disc and by bending downthe'cut-out parts at right angles 35 to the plane of the disc. Lever 9carries the pivot -of a small lever or pawl 25 which is thus suspendedunder lever 5 and is resiliently applied against the end of an arm 21,by mean'sof spring 26, said arm being pivoted at 28 and protruding 0outside of top-part 8, to be actuated. The end of said arm isobtuseangled (see Fig. 2). Whe n the arm is in an extreme position andpresents to lever 25- the small side of its terminal edge, said lever 25is pushed back towards the pivot of lever 5 9, compressing spring 26,whilst in the other extremeposition, the spring 26 acts and pushes lever25 away from the'pivot of lever 9.

In this last named position, when lever 9 is lowered, to realize aperforation, pawl 25 engages 5o disc 22 by one ofits teeth and provokesrotation thereof according to a determined angle, so that drums l9 arerotated sufficiently to advance the ends of the reinforcing strips l1over the holes .8.

' Thus, in this position, the machine perforates and 5s provides thedocument with reinforcing strip. In the other position of arm 21, pawl25 does not contact with disc 22 and the machine only perforates.

5 Because of this actuating device of bobbins l9,

it will be understood that if, for any reason whatsoever, arm 9 has notbeen fully lowered and has risen disc 22 will be kept in the positionwhich pawl 25 has conferred to it, through incomplete lowering of lever9, any later movement to lower said lever will only determine movementof disc 22 from the moment when pawl 25 will engage said disc. That isto say in this later movement disc 22 will only rotate sufficiently toconclude its 15 normal complete movement. The quantity of paper I! whichhas advanced and has been fed during incompletemovement will thus not belost and will be exactly 'comple-ted during the following movement oflever 9.

To ensure proper and sure progress of reinforcing strips I1 and toensure that they possess enough rigidity to enable proper cuttingoperation of said strips by means of head 8, the feeding drums orbobbins I920 are of special form to confer to the strips which comes outof between them, a transversally non-plane form, for instance arched. Tothat end the two lower bobbins 20 have their axis 29 carried bythe endof a spring blade 30 combined with another lower blade 3|. Blade 30carries on its upper face a forked blade 32 passing over axis 29, saidforked blade passing over axis 29 and its arms extending substantiallyto the neighborhood of the extreme edge of table 4.

In one position, a rotating arm 33 playing the part of a cam, pushesback upwards, the assembly of springs 303|, to resiliently apply thedrum or roller 20 against the upper drum or bobbin [9.

Rollers 2|) have their round surfaceprovided with teeth or ribs and incross section said ribbed 40 edge is arched correspondingly to the formto be conferred to strip IT. The drums l9 comprise in their cylindricalsurface a medium off-set part 36 (hollow), the edges of which aretransversally ribbed as shown at 34, the smooth parts of said 45cylindrical surface being lined by an edge such as 35 which guides strip11. Roller 20 engages itself in the hollow part 36, so that strip l1which passes through, between drums l9 and 20 is transversally. arched,feeding being realized thanks to 50 the ribs 34 and to the teeth ofroller 20.

' To lighten the construction, drums l9 may comprise three parts: a fullor solid central part 36 to which are connected (by welding, etc.) thetwo hollow side parts. Solid part 36 can also be in form of a cylinderor ring with ribbed or grooved cylindrical surface lodged between twosmooth cylindrical parts (see left of Fig. 3). In that case, roller 20possesses a cylindrical surface the cross section of which is. offrusto-conical form and which is ribbed on its small base.

The protruding arms of fork 32 serve to guide and support the edges ofstrip 11, between drum l9 and perforating table 4.

This guiding, in the direction exactly perpendicular to that of table 4can however only be realized by said fork to a-certain extent becausethe arms of said fork cannot extend up to the table. To ensure thisguiding until cutting operation by head 8 takes place, two protrudingarms 39 for each knife 38 are provided, said arms extendinglongitudinally on each side of a knife. As soon as head 8 gets nearer totable 4, said two arms thus embrace the two sides of strip H which iswell maintained against any transversal displacement 75 during laterlowering of knife 38. Moreover those guiding arms could be provided atthe edge of the table itself.

To render the cutting operation more easy the 'cutting edge of themoving knife is inclined in .same time a reinforcing strip provided withgum,

consists in that the small discs cut out by the punches fall on theground or on the support and soil other objects to which they couldstick. To avoid this disadvantage, there is provided under that part oftable 4 which juts out on each side of the support I, a small receptaclesuch as 40, pivoted at 4| and which is normally under a hole 6 of plate4. The small discs removed by the punches are received. in saidreceptacles which may be emptied from time to time by pivoting them awayfrom the table as shown .by the dotted lines in Fig. 2.

Thedescribed machine is provided to work with strips I! one side ofwhich is coated with a dry paste or glue for use without heating. Themachine can however be foreseen for use with strips coated with asticking paste containing rubber and which necessitates a certain amountof heating. To that end, table 4 is provided with an isolated plate 42to which a heating current is lead by means of wires 43 and terminals44.

Plate 42 is lodged in or under table 4 in the neighborhood ofperforation holes 5 and it heats up table 4 suificiently to ensure thatthe coating mass of strips II becomes plastic and sticky.

Having now fully described my said invention, what I claim and desire tosecure by Letters Patent is:

1. In a paper perforating device in combination, a base, a pair ofpunches mounted thereon, a pair of dies cooperating with said punches,an operating lever for actuating said punches, two reels of adhesivestrip 'rotatably mounted on said base, means actuated by the operatinglever for feeding said strips between said punches and dies, said meanscomprising an arm pivotally connected with said operating lever, andmeans for restoring said operating lever and said pivotal arm into theiroriginal positions if said operating lever is released after precedinglybeing actuated, a shaft mounted on said base, a ratchet wheel mounted onsaid shaft and adapted to be engaged and rotated by said arm if saidoperating lever is actuated, one drum at each end of said shaft,.on eroller adjacent to each drum, resiliently mounted on said base, betweenwhich rollersand drums said adhesive strips are drawn each time theoperating lever is actuated, means for disengaging said pivotal arm fromsaid ratchet wheel at will and means mounted on said punches forsimultaneously pressing said strips into contact with the paper andsevering predetermined lengths from said strips.

2. In a paper perforating device in combination, a base, a pair ofpunches mounted thereon, a pair of dies cooperating with said punches,an operating lever adapted to be depressed for actuating said punches,two reels of adhesive strip rotatably mounted on said base, meansactuated by said operating lever for feeding said strips between thepunches and dies, said means comprising'a shaft mounted on said base, aratchet wheel mounted on said shaft, an arm' pivotally connected withsaid operating lever and adapted to engage a tooth of said ratchet wheelwhile said operating lever is depressed and to rotate said ratchet wheelat about an angle corresponding to the distance said operating leverisdepressed, one drum at each end of said shaft, and one roller adjacentto each drum, resiliently mounted on said base, between which rollersand drums the adhesive strips are drawn each time said operating leveris depressed and means for restoring said operating lever and saidpivotal arm into their original positions if said operating lever isreleased after precedingly being depressed, means for disengaging saidpivotal arm from said ratchet wheel at will and means mounted on saidpunches for simultaneously press= ing strips into contact with the paperand severing predetermined lengths from said strips.

3. In a paper perforating device in combination,

a base, a pair of punches mounted thereon, a pair of dies cooperatingwith said punches, an operating lever adapted to be depressed foractuating said punches, two reels of adhesive strip rotatably mounted onsaid base, means actuated by said operating lever for feeding saidstrips between the. punches and dies, said means comprising a shaft Imounted on said base, a ratchet wheel mounted resiliently mounted onsaid base, between which rollers and drums said adhesive strips aredrawn each time said operating lever is depressed, means for restoringsaid operating lever and said pivotal a'rm' into their originalpositions if said operating I 'lever is released after precedingly beingdepressed whereby'the operating arm reengages the'same tooth of theratchet wheel and finishes the rotation if released before finishing therotation of the ratchet wheel corresponding to one tooth and activatedagain, means for disengaging said pivotal arm from said ratchet wheel atwill and means mounted on said punches for simultaneously pressingstrips into contact with the paper and 'severing predetermined lengthsfrom said strips.

. 4. In a paper perforating device in combination, a base, a pair ofpunches mounted thereon, a pair of dies cooperating with said punches;an operating lever actuating said punches, two reels of adhesive striprotatably mounted on said base, means actuated by said operating leverfor feeding said strips between said punches and dies, said meanscomprising an arm pivotally connected with said operating lever, a shaftmounted on said base, a ratchet wheel mounted on said shaft and adaptedto be engaged and rotated by said arm if said operating lever isactuated, one drum at each end of said shaft, one roller adjacent toeach drum.

resiliently mounted on said base, between which rollers and drums saidadhesive strips are drawn each time the operating lever is actuated,springs adapted to press said rollers against said adhesive strips, andmeans for removing said rollers from contact with'said adhesive strips,means for disengaging said pivotal arm from said ratchet wheel at willand means mounted on said punches for simultaneously pressing saidstrips into contact 5. In a paper perforating device in combination, abase, a pair of punches mounted thereon, a pair of dies cooperating withsaid punches, an operat inglever actuating said punches, two reels ofadhesive strip rotatably mounted on said base, means actuated by saidoperating lever for feeding said strips between said punches and dies,said means comprising an arm pivotally connected with said operatinglever, a shaft mounted on said base, a

ratchet wheel mounted on said shaft adapted to be engaged and rotated bysaid arm if said operating lever is actuated, one drum at each end ofsaid a shaft, one roller adjacent to each drum, between which rollersand drums said adhesive strips are drawn each time said operating leveris actuated, springs mounted on said base for supporting said rollersand means for bringing said rollers supported by said springs in or outof contact with said adhesive strips, means for disengaging said pivotal,arm from said ratchet wlfeel at will and means mounted on said punchesfor simultaneously pressing said strips'into contact with the paper andsevering predetermined lengths from said strips; 4

6. In a paper perforating device in combination,

abase, at least one punch mounted thereon, at

least one die cooperating with said punch, an operating lever foractuating said punch, at least one reel of adhesive strip rotatablymounted on said base, means actuated by said operating lever for feedingsaid strip between said punch and said die, said means comprising an armpivotally connected with said operating lever, a shaft mounted on saidbase, a ratchet wheel mounted on said shaft and adapted to be engaged bysaid arm, a drum at at least one end of said shaft and a rollerresiliently mounted on said base, between which roller and drum saidadhesive strip is drawn each time the operating lever is actuated, saiddrum having a peripheral surface with a centrally disposed angu- .larchannel and said roller having a peripheral surface substantiallycomplementary to the peripheral surface of said drum and adaptedtoengage with said angular, channel, means for disengaging said pivotalarm'from said ratchet wheel at willand means mounted on said punch forsimultaneously pressing said strip into contact with the paper andsevering a predetermined length from said strip. 1

'7. In a paper perforating device in combination, abase, at least onepunch mounted thereon, at least one die cooperating with said punch, anoperating lever for actuating said punch, at least one reel of adhesivestrip rotatably mounted on said base. means actuated by said operatinglever for feeding said strip between said punch and said die, said meanscomprising an arm pivotally connected with said operating lever, a shaftmounted on said base, a ratchet wheel mounted on said shaft and adaptedto be engaged by said arm, a drum at at least one end of said shaft anda roller resiliently mounted on said base, between which roller and drumsaid adhesive strip is drawn each time the operating lever is actuated,said drum having a peripheral surface with a centrally disposed angularchannel. said roller having a peripheral sur with the paper and severinga predetermined length from said strip.

8. In a paper perforating device in combination, a base, a pair ofpunches mounted thereon, a pair of dies cooperating with said punches,an operating lever for actuating said punches, two reels of adhesivestrip rotatably mounted on said base, means actuated by the operatinglever for feeding said strips between said punches and dies, said meanscomprising an arm pivotally connected with said operating lever, a shaftmounted on said base, a ratchet wheel mounted on saidshaft and adaptedto be engaged and rotated by said arm if said operating lever isactuated, one drum at each end of said shaft, one roller adjacent toeach drum resiliently mounted on said base, between which rollers anddrums said adhesive strips are drawn each time the operating lever isactuated, said drums having a substantially' concave peripheral surfaceand said rollers having a substantially convex peripheral surfaceforming substantially complementary surfaces to the peripheral surfacesof said drums and means for restoring said operating lever and saidpivotal arm into their original positions if said operating lever isreleased after precedingly being actuated, means for disengaging saidpivotal arm from said ratchet wheel at will and means mounted on saidpunches for simultaneously pressing said strips into contact with thepaper and severing predetermined lengths from said strips.

9. In a paper perforating device in combination, a base, a pair ofpunches mounted thereon, a pair of dies cooperating with said punches,an operating lever for actuating said punches, two reels of adhesivestrip rotatably mounted on said base, means actuated by said operatinglever for feeding said strips between said punches and dies, said meanscomprising an arm pivotally connected with operating lever, a shaftmounted on said base, a ratchet wheel mounted on said shaft and adaptedto be engaged and rotated by said arm if said operating lever isactuated, one drum at each end of said shaft, one roller adjacent toeach drum, resiliently mounted on said base, between which rollers anddrums said adhesive strips are drawn each time the operating lever isactuated, said drums having peripheral surfaces with a centrallydisposed angular channel, said rollers having peripheral surfacessubstantially complementary to the peripheral surfaces of said drum andadapted to engage with said angular channels and means for restoringsaid operating lever and said pivotal am into their original positionsif said operating lever is released after precedingly being actuated,means for'disengaging said pivotal arm from said ratchet wheel at willand means mounted on said punches for simultaneon said base, a ratchetwheel mounted on said shaft and adapted to be engaged by said arm, adrum at at least one end of said shaft, a roller resiliently mounted onsaid base, between which roller and 'drum the adhesive strip is drawneach time the operating lever is actuated, said drum having a peripheralsurface with a centrally disposed angular channel, said roller having aperipheral surface substantially complementary to the peripheral surfaceof said drum and adapted to engage with said angular channel and meansfor removing said resiliently mounted roller from contact with saidadhesive strip, means for disengaging said pivotal arm from said ratchetwheel at will and means mounted on said punch for simultaneouslypressing said strip into contact with the paper and severing apredetermined length from said strip.

11. In a paper perforating device in combination, a base, at least onepunch mounted thereon, at least one die cooperating with said punch, an

, operating lever for actuating said punch, at least one reel ofadhesive strip rotatably mounted on said base, means actuated by saidoperating lever for feeding said strip between said punch and said die,said means comprising an arm pivotally connected with said operatinglever, a shaft mounted on said base, a ratchet wheel mounted on saidshaft and adapted to be engaged by said arm, a drum at at least one endof said shaft, a roller resiliently mounted on said base, between whichroller and drum said adhesive strip is drawn each time the operatinglever is actuated, said drum having a peripheral surfacewith a centrallydisposed angular channel, said-roller having a peripheral surfacesubstantially complementary to the peripheral surface of said drum andadapted to engage with said angular channel, serrations on the edges ofsaid channel and serrations on the peripheral surface of said rolleradapted to coact with said serrations on said edges and means forremoving said resiliently mounted roller out of contact with theadhesive strip, means for disengaging said pivotal arm from said ratchetWheel at will and means mounted on said punch for simultaneouslypressing said strip into contact with the paper and severing apredetermined length from said strip.

12. In a paper perforating device in combination a base, at least onepunch mounted thereon,

at least one die cooperating with said punch, an operating leveractuating said punch, at least one reel of adhesive striprotatablymounted on said base, means actuated by said operating leverfor feeding said strip between said punch and said die, said meanscomprising .an arm pivotal on and.

passing through a slot in said operating lever, a shaft mounted on saidbase, a ratchet wheel mounted on said shaft and adapted to be engagedand rotatedv by said arm if said operating lever is actuated, a drum atat least one end of said shaft and one roller adjacent to said drumresiliently mounted on said base between which roller and which drumsaid adhesive strip is drawn each time said operating lever is actuated.means for disengaging said pivotal arm from said ratchet Wheel at willand means mounted on said punch for simultaneously pressing said stripinto contact with the paper and severing a predetermined length fromsaid strip.

IDA SKREBBA' c 8. STUHLINGER.

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